Dumbster

import java.util.Properties;

import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

import junit.framework.TestCase;

import com.dumbster.smtp.SimpleSmtpServer;

/**
* Demonstrate possible bug in Dumbster when Transport.isConnected() is
called.
*/
public class DumbsterTest extends TestCase {
private static final String HOST = "localhost";
private static final int PORT = 1000;

/**
* Succeeds: one email recorded.
*/
public void testSendWithoutConnectedCheck() throws Exception {
SimpleSmtpServer server = SimpleSmtpServer.start(PORT);
sendEmail(false);
server.stop();
assertEquals("# emails received", 1, server.getReceivedEmailSize());
}

/**
* Fails: two emails recorded. The second is completely blank.
* The javadocs for Transport.isConnected() say it actually pings the
* server:
* {@link
http://java.sun.com/products/javamail/javadocs/com/sun/mail/smtp/SMTPTransp
ort.html#isConnected()}
*/
public void testSendWithConnectedCheck() throws Exception {
SimpleSmtpServer server = SimpleSmtpServer.start(PORT);
sendEmail(true);
server.stop();
assertEquals("# emails received", 1, server.getReceivedEmailSize());
}

private void sendEmail(boolean checkState) throws Exception {
Properties props = new Properties();
props.put("mail.smtp.host", HOST);
props.put("mail.smtp.port", String.valueOf(PORT));
Session session = Session.getDefaultInstance(props, null);
Transport transport = session.getTransport("smtp");
transport.connect(HOST, PORT, null, null);
MimeMessage message = new MimeMessage(session);
message.setContent("test body", "text/plain");
message.setSubject("test subject");
message.setFrom(new InternetAddress("from@example.com"));
message.addRecipient(Message.RecipientType.TO, new
InternetAddress("to@example.com"));
transport.sendMessage(message, message.getAllRecipients());
if (checkState) transport.isConnected();
transport.close();
}
}